On Tuesday 17 November 2020 10:29:43 Todd Zuercher wrote: > Those disposable, oil free air compressors from harbor freight (or > most other big box stores) are barely worth the zinc they are cast > from. And aren't good for much other than pumping up the occasional > car tire, or powering a nail gun for hobby purposes. They certainly > are not up to continual usage at anything close to their rated CFM. > > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 > > -----Original Message----- > From: Gene Heskett <[email protected]> > Sent: Tuesday, November 17, 2020 10:12 AM > To: [email protected] > Subject: [Emc-users] Might have found an air pump for a small mister > > [EXTERNAL EMAIL] Be sure links are safe. > > The pump from the soldering station is some sort of a scroll pump with > very little pressure ability, which when its 50L a minute air delivery > is sent thru a ball point pen tip looks as if its good enough as far > as flow but lack of pressure concerns me. I found the maker in china > and it sells for $6.70 in 10,000 lots minimum order. So I went looking > for something with more pressure and found this one. > > <https://omeikelectronic.en.made-in-china.com/product/yCBJKjsvUNkj/Chi >na-20lpm-High-Flow-12V-DC-Micro-Air-Pump-Electric-Operated-Diaphragm-Pu >mp.html> > > Only 15-18 L/minute, but up to 70 pksa whatever that is. And it had a > get sample button, so obviously I hit it. I'll let folks know when it > has arrived. Needs around an amp at 12 volts. And std mister nozzles > will need mods to better the atomizing. Those el-cheapo gizmo's are > very profligate with their use of air. Burns up a $125 HF 2hp air > compressor. This makes far more sense for smaller machines spinning > 1/8" tooling.
That is a given, although one like it built that garage 12 years ago. Compressing air is hard work because of the heat released. Which is why I can't understand the use of big roots type blowers to supercharge big IC engines in Dragsters. A 500 CID engine has to make the first 700 horsepower just to pull the blower and put 20 psi in the intake manifold at 5 grand. Latham used to make an axial flow multistage fan that could put 20 psi into a 272 ford v8 in the late 1950's that only needed 15 hp to do that job. I once watched a 58 ford 4 door with a Latham on it, do 145 something in the quarter in about 9.7 seconds at Alton Ill. On street tires. Burning gas he drove it about a 100 miles to/from the strip that day and raced it the way he drove it, claimed it got 17 mpg on the road. That to me was an impressive step in the right direction. The high light of the day was seeing the guys from Speed-Sport Auto in Tucson AX blow a nitro burning hemi in a T bucket at about 160, rolled the remains to the pit, started grabbing boxes out of the pickup and built a complete fresh hemi, and had it barking at the line in 2h21m. We all turned on our headlights to light up the track as it was getting dark but when the tree turned green it set a new track record at 166 mph. Me, I was driving a 49 Nash Ambassador that was actually quite a concealed weapon itself. Cruised at 90 mph, while getting 21 mpg, could do 120. But it had toys for brakes. Suffice to say. I had learned how to make that 236 cid engine run very well. At rpms that self destructed piston rings from piston overspeeds as it was a stroker at 4 3/8". Designed at the time with every racing engine trick in it, bigger than bore tuliped valves, big mushroom faced tappets so the cam could be both high and square, built to turn 8 grand and could, but not at that stroke, broke every ring in it into 1/4" pieces if you turned it much over 7G's. The first of the unit bodies, it was rigidity personified and a dream to drive at any speed or traction angle if you felt like hanging the rear end out 3 feet and steering with the throttle. It didn't do anything you didn't tell it to do. But 70 years later I think rust has finshed them all. Which is sad, they were state of the art in high performance auto engineering in 1949. > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > If we desire respect for the law, we must first make the law > respectable. - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
